A Joe Biden Administration would have to decide to what extent to unpick the major United States trade policy shifts of the last four years. A quick return to comprehensive trade talks with the European Union is unlikely and the US will remain focused on its rivalry with China. Nevertheless, there would be areas for EU/US cooperation, not least World Trade Organisation reform.
If Donald Trump loses the United States presidential election in November, he will ultimately be seen to have left little mark in many areas. But in the US's relationship with China, the decoupling of economic links could continue, and that could force Europe into hard choices.